var newUrl;
function getPager(url, sum, currnum, length,idTag) {
		newUrl =url;
		sum=parseInt(sum); 
		currnum=parseInt(currnum);
		length=parseInt(length);
		if (length >= sum) {
			document.getElementById(idTag).innerHTML= "";
			return "";	
		}
		var showsum = "共";
		var showitem = "页";
		var showfirstpage = "首页";
		var showuppage = "<";
		var shownextpage = ">";
		var showlastpage = "尾页";
		var showjump = "跳转到";
		var showselect = "Go";
//		var showtotal = "共";
//		var showpage = "页";
		var pagerinfo = '';
		var sbinfo = '';
		sbinfo+="<div class='pager'>";
		var pagenum = 0;
		if (sum % length == 0) {
			pagenum = sum / length;
			pagenum = parseInt(pagenum); 
		} else {
			pagenum = sum / length-0 + 1;
			pagenum = parseInt(pagenum); 
		}
		showfirstpage = "" +1;
		showlastpage = ""+pagenum;
		var first = "";
		if (url.indexOf("?") != -1) {
			first = "&";
		} else {
			first = "?";
		}
		var pageUrl = "";
		sbinfo+=(showsum + "<font color=\"gray\">" + pagenum + "</font>"
				+ showitem + "   ");
		if (1 == currnum) {
			sbinfo+=(showuppage + " ");
		} else {
			pageUrl = url + first + "currpage=" + (currnum - 1);
			sbinfo+=("<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;  \" href=\""
					+ pageUrl + "\" >" + showuppage + "</a> ");
		}
		var firstUrl = url + first + "currpage=" + 1;
		sbinfo+=("<a class='paginationjs-prev J-paginationjs-previous' href=\"" + firstUrl + "\">"
				+ showfirstpage + "</a> ");
		var tempstr = "";
		if (pagenum < 6) {
			var tag = 0;
			for (var i = 2; i < pagenum + 1 && i <= pagenum-1; i++) {
				pageUrl = url + first + "currpage=" + i;
				if (i == currnum) {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font color=\"gray\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=(tempstr);
				if(i>=pagenum-1){
					tag = 1;
				}
			}
		} else if (currnum > pagenum - 1) {
			var tag = 0;
			sbinfo+=("...");
			for (var i = currnum - 4; i < pagenum + 1 && i <= pagenum-1; i++) {
				pageUrl = url + first + "currpage=" + i;
				if (i == currnum) {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font color=\"gray\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=(tempstr);
				if(i>=pagenum-1){
					tag = 1;
				}
			}
		} else if (currnum < 4) {
			var tag = 0;
			for (var i = 2; i < currnum + 3 && i <= pagenum-1; i++) {
				pageUrl = url + first + "currpage=" + i;
				if (i == currnum) {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font  color=\"gray\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=(tempstr);
				if(i>=pagenum-1){
					tag = 1;
				}
			}
			if(tag == 0){
				sbinfo+=("...");
			}
		} else {
			if(currnum - 2 > 2){
				sbinfo+=("...");
			}else{
				
			}
			var tag = 0;
			for (var i = currnum - 2; i < currnum + 3 && i <= pagenum-1; i++) {
				pageUrl = url + first + "currpage=" + i;
				if (i == currnum) {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl
							+ "\" ><b><font  color=\"gray\">"
							+ i
							+ "</font></b></a> ";
				} else {
					tempstr = "<a class='paginationjs-prev J-paginationjs-previous'  stlye=\"text-decoration: none;\" href=\""
							+ pageUrl + "\" >" + i + "</a> ";
				}
				sbinfo+=tempstr;
				if(i>=pagenum-1){
					tag = 1;
				}
			}
			if(tag == 0){
				sbinfo+=("...");
			}
		}
		var endUrl = url + first + "currpage=" + pagenum;
		sbinfo+=(" <a class='paginationjs-prev J-paginationjs-previous'  href=\"" + endUrl + "\">"
				+ showlastpage + "</a> ");
		if (currnum == pagenum) {
			sbinfo+=(shownextpage);
		} else {
			pageUrl = url + first + "currpage=" + (currnum + 1);
			sbinfo+=("<a class='paginationjs-prev J-paginationjs-previous' href=\"" + pageUrl
					+ "\">" + shownextpage + "</a>");
		}
		var selecturl = url + first;
		sbinfo+=(showjump
				+ "<input id='goButton' class='form-control' style='display:inline-block;width: 40px;height:25px; margin-left:5px; margin-top:-4px' >"+"</input>");
		sbinfo+=("</input type='text'><button id='go' onclick=\"go()\">GO</button>");	
		pagerinfo = sbinfo;
		document.getElementById(idTag).innerHTML=pagerinfo;
	}
function go(){
	var tt= document.getElementById("goButton").value;
	var first = "";
	if (newUrl.indexOf("?") != -1) {
		first = "&";
	} else {
		first = "?";
	}
	var listURL = newUrl+first+"currpage="+tt;
	// 跳转前将URL编码
	listURL = encodeURI(listURL);
	window.location.href = listURL;
}